688 = 24 x 43.
688 has a unique representation as a sum of three squares: 688 = 122 + 122 + 202.
688 is a vampire number because there exists a factorization of 688 using 688's digits: 688 = 86 x 8. It is also a Friedman number.
688 is 221111 in base 3, 2002 in base 7, 844 in base 9, 494 in base 12, and 224 in base 18.
The 688 Club was a popular alternative music venue in Atlanta, Georgia.
